/**进入全屏 */
export function enterFullscreen() {
  const docElm = document.documentElement
  if (docElm.requestFullscreen) docElm.requestFullscreen()
  else if (docElm.mozRequestFullScreen) docElm.mozRequestFullScreen()
  else if (docElm.webkitRequestFullScreen) docElm.webkitRequestFullScreen()
  else if (docElm.msRequestFullscreen) docElm.msRequestFullscreen()
}
/**退出全屏 */
export function exitFullscreen() {
  if (document.exitFullscreen) document.exitFullscreen()
  else if (document.mozCancelFullScreen) document.mozCancelFullScreen()
  else if (document.webkitExitFullscreen) document.webkitExitFullscreen()
  else if (document.msExitFullscreen) document.msExitFullscreen()
}
/**判断是否全屏 */
export function isFullscreen() {
  const fullscreenElement =
    document.fullscreenElement ||
    document.mozFullScreenElement ||
    document.webkitFullscreenElement ||
    document.msFullscreenElement ||
    document.webkitCurrentFullScreenElement
  return !!fullscreenElement
}
